/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:43:34,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:43:34,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:43:34,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:43:34,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:43:34,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:43:34,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:43:34,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:43:34,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:43:34,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:43:34,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:43:34,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:43:34,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:43:34,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:43:34,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:43:34,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:43:34,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:43:34,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:43:34,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:43:34,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:43:34,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:43:34,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:43:34,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:43:34,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:43:34,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:43:34,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:43:34,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:43:34,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:43:34,202 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:43:34,221 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:43:34,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:43:34,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:43:34,222 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:43:34,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:43:34,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:43:34,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:43:34,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:43:34,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:43:34,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:43:34,223 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:43:34,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:43:34,224 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:43:34,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:43:34,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:43:34,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:43:34,224 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:43:34,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:43:34,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:43:34,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:43:34,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:43:34,226 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:43:34,226 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:43:34,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:43:34,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:43:34,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:43:34,574 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:43:34,574 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:43:34,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c [2021-05-06 08:43:34,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bd8ba17/9b90772550cf468b84b4e27cad798b77/FLAGe8df6fa48 [2021-05-06 08:43:34,997 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:43:34,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c [2021-05-06 08:43:35,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bd8ba17/9b90772550cf468b84b4e27cad798b77/FLAGe8df6fa48 [2021-05-06 08:43:35,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bd8ba17/9b90772550cf468b84b4e27cad798b77 [2021-05-06 08:43:35,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:43:35,034 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:43:35,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:43:35,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:43:35,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:43:35,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:43:35" (1/1) ... [2021-05-06 08:43:35,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d7cb519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:35, skipping insertion in model container [2021-05-06 08:43:35,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:43:35" (1/1) ... [2021-05-06 08:43:35,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:43:35,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:43:35,167 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c[525,538] [2021-05-06 08:43:35,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:43:35,195 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:43:35,207 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c[525,538] [2021-05-06 08:43:35,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:43:35,248 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:43:35,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:35 WrapperNode [2021-05-06 08:43:35,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:43:35,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:43:35,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:43:35,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:43:35,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:35" (1/1) ... [2021-05-06 08:43:35,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:35" (1/1) ... [2021-05-06 08:43:35,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:35" (1/1) ... [2021-05-06 08:43:35,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:35" (1/1) ... [2021-05-06 08:43:35,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:35" (1/1) ... [2021-05-06 08:43:35,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:35" (1/1) ... [2021-05-06 08:43:35,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:35" (1/1) ... [2021-05-06 08:43:35,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:43:35,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:43:35,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:43:35,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:43:35,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:43:35,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:43:35,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:43:35,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:43:35,394 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:43:35,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:43:35,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:43:35,394 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:43:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:43:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:43:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:43:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:43:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:43:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:43:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:43:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:43:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:43:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:43:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:43:35,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:43:35,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:43:35,667 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:43:35,667 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:43:35,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:43:35 BoogieIcfgContainer [2021-05-06 08:43:35,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:43:35,669 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:43:35,669 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:43:35,670 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:43:35,673 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:43:35" (1/1) ... [2021-05-06 08:43:35,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:43:35 BasicIcfg [2021-05-06 08:43:35,685 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:43:35,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:43:35,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:43:35,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:43:35,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:43:35" (1/4) ... [2021-05-06 08:43:35,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693e8940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:43:35, skipping insertion in model container [2021-05-06 08:43:35,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:35" (2/4) ... [2021-05-06 08:43:35,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693e8940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:43:35, skipping insertion in model container [2021-05-06 08:43:35,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:43:35" (3/4) ... [2021-05-06 08:43:35,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693e8940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:43:35, skipping insertion in model container [2021-05-06 08:43:35,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:43:35" (4/4) ... [2021-05-06 08:43:35,700 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound20.cJordan [2021-05-06 08:43:35,705 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:43:35,708 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:43:35,728 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:43:35,760 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:43:35,760 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:43:35,760 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:43:35,760 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:43:35,760 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:43:35,760 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:43:35,760 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:43:35,760 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:43:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:43:35,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 08:43:35,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:35,786 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:35,787 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:35,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-06 08:43:35,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:35,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761750658] [2021-05-06 08:43:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:35,914 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:35,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329649942] [2021-05-06 08:43:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:43:36,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:43:36,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:43:36,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:36,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761750658] [2021-05-06 08:43:36,099 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:36,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329649942] [2021-05-06 08:43:36,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329649942] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:43:36,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:43:36,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:43:36,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090688069] [2021-05-06 08:43:36,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:43:36,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:36,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:43:36,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:43:36,130 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:43:36,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:36,144 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-06 08:43:36,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:43:36,145 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 08:43:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:36,151 INFO L225 Difference]: With dead ends: 22 [2021-05-06 08:43:36,151 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 08:43:36,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:43:36,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 08:43:36,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 08:43:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:43:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 08:43:36,180 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 08:43:36,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:36,181 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 08:43:36,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:43:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 08:43:36,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:43:36,182 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:36,183 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:36,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:43:36,408 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:36,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-06 08:43:36,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:36,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730580919] [2021-05-06 08:43:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:36,425 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:36,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389161236] [2021-05-06 08:43:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:43:36,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:43:36,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:36,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:36,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:36,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:36,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:36,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:43:36,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:36,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730580919] [2021-05-06 08:43:36,644 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:36,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389161236] [2021-05-06 08:43:36,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389161236] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:43:36,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:43:36,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:43:36,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116375973] [2021-05-06 08:43:36,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:43:36,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:36,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:43:36,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:43:36,649 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:43:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:36,662 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-06 08:43:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:43:36,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:43:36,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:36,667 INFO L225 Difference]: With dead ends: 19 [2021-05-06 08:43:36,667 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 08:43:36,668 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:43:36,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 08:43:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 08:43:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:43:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 08:43:36,676 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 08:43:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:36,679 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 08:43:36,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:43:36,679 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 08:43:36,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:43:36,680 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:36,680 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:36,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:36,881 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:36,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-06 08:43:36,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:36,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999837339] [2021-05-06 08:43:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:36,893 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:36,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436705835] [2021-05-06 08:43:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:43:36,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:43:36,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:36,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:36,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:43:37,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:37,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999837339] [2021-05-06 08:43:37,017 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:37,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436705835] [2021-05-06 08:43:37,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436705835] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:43:37,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:43:37,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:43:37,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217098662] [2021-05-06 08:43:37,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:43:37,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:37,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:43:37,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:43:37,019 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:43:37,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:37,051 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 08:43:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:43:37,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:43:37,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:37,052 INFO L225 Difference]: With dead ends: 26 [2021-05-06 08:43:37,052 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 08:43:37,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:43:37,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 08:43:37,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 08:43:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:43:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 08:43:37,056 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 08:43:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:37,056 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 08:43:37,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:43:37,057 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 08:43:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:43:37,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:37,057 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:37,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:37,269 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:37,270 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-06 08:43:37,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:37,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114242342] [2021-05-06 08:43:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:37,284 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:37,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019541918] [2021-05-06 08:43:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:43:37,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:43:37,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:37,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:43:37,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:37,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114242342] [2021-05-06 08:43:37,422 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:37,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019541918] [2021-05-06 08:43:37,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019541918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:43:37,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:43:37,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:43:37,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601605333] [2021-05-06 08:43:37,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:43:37,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:37,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:43:37,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:43:37,424 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:43:37,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:37,461 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-06 08:43:37,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:43:37,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:43:37,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:37,463 INFO L225 Difference]: With dead ends: 27 [2021-05-06 08:43:37,463 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:43:37,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:43:37,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:43:37,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:43:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:43:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 08:43:37,472 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 08:43:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:37,472 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 08:43:37,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:43:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 08:43:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:43:37,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:37,477 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:37,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:37,693 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:37,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:37,693 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-06 08:43:37,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:37,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990589932] [2021-05-06 08:43:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:37,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:37,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288400770] [2021-05-06 08:43:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:43:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:43:37,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:37,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:43:37,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:37,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990589932] [2021-05-06 08:43:37,908 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:37,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288400770] [2021-05-06 08:43:37,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288400770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:43:37,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:43:37,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:43:37,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317295136] [2021-05-06 08:43:37,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:43:37,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:37,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:43:37,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:43:37,910 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:43:37,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:37,968 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 08:43:37,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:43:37,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:43:37,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:37,971 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:43:37,971 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:43:37,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:43:37,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:43:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:43:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:43:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 08:43:37,982 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 08:43:37,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:37,982 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 08:43:37,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:43:37,983 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 08:43:37,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:43:37,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:37,983 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:38,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:38,184 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:38,184 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-06 08:43:38,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:38,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968074047] [2021-05-06 08:43:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:38,201 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:38,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876006457] [2021-05-06 08:43:38,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:38,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:43:38,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:43:38,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:43:38,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:38,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:43:38,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:38,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968074047] [2021-05-06 08:43:38,388 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:38,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876006457] [2021-05-06 08:43:38,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876006457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:43:38,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:43:38,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:43:38,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118946816] [2021-05-06 08:43:38,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:43:38,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:38,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:43:38,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:43:38,390 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:43:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:38,432 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-06 08:43:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:43:38,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:43:38,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:38,433 INFO L225 Difference]: With dead ends: 35 [2021-05-06 08:43:38,433 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:43:38,433 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:43:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:43:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:43:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:43:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-06 08:43:38,437 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-06 08:43:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:38,437 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-06 08:43:38,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:43:38,438 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-06 08:43:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:43:38,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:38,438 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:38,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:38,664 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:38,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:38,664 INFO L82 PathProgramCache]: Analyzing trace with hash -869871361, now seen corresponding path program 2 times [2021-05-06 08:43:38,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:38,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136037392] [2021-05-06 08:43:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:38,673 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:38,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754538322] [2021-05-06 08:43:38,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:38,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:43:38,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:43:38,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:43:38,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:38,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:43:38,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:38,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136037392] [2021-05-06 08:43:38,960 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:38,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754538322] [2021-05-06 08:43:38,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754538322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:43:38,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:43:38,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:43:38,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242265191] [2021-05-06 08:43:38,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:43:38,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:38,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:43:38,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:43:38,962 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:43:39,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:39,260 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-06 08:43:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:43:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:43:39,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:39,261 INFO L225 Difference]: With dead ends: 42 [2021-05-06 08:43:39,261 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 08:43:39,262 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:43:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 08:43:39,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 08:43:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:43:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 08:43:39,265 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 08:43:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:39,265 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 08:43:39,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:43:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 08:43:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:43:39,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:39,266 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:39,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:39,490 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:39,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:39,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-06 08:43:39,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:39,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76605663] [2021-05-06 08:43:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:39,498 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:39,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611071066] [2021-05-06 08:43:39,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:39,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:43:39,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:43:39,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:43:39,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:39,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:43:39,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:39,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76605663] [2021-05-06 08:43:39,819 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:39,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611071066] [2021-05-06 08:43:39,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611071066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:43:39,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:43:39,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:43:39,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764153618] [2021-05-06 08:43:39,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:43:39,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:39,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:43:39,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:43:39,821 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)